Adding-attachment for type-writing machines.



v M. C. GRAWLEY. ADDING ATTACHMENT FUR TYPE WRITING MACHINES. APPLIOATION PILED JULY 2B, 1908.

Patented Jan. 14, 1913.

\ 4 sums-sum 1.

WITNESSES INVENTOR Z MfNSl-IELD QQ AWLEY.

flaw W ATTORNEY M. C. CRAWLEY.

ADDING ATTACHMENT FOR TYPE WRITING MACHINES.

APPLIOATIONFILED JULY 28, 1908.

4 SHEETSSHEET 2.

WITNESSES INVENTOR f MANSFIELD c. CRAWLEY- v BY Patented Jan. 14,1913.

M. C. GRAWLEY. ADDING ATTACHMENT FOR TYPE WRITING MACHINES.

APPLICATION FILED JULY28,190&

Patented J an. 14, 1913.

WTNESSES Mnusnun c. cMwLEY.

ATTORNEY INVENTOR M. C. CR'AWLEY.

ADDING ATTACHMENT FOR TYPE WRITING MACHINES.

APPLIOATION FILED JULY 28,1908

Patented Jan. 14, 1913.

4 SHEETSSHEBT 4.

WITNEErSES MRNSFIELD C CHRWLEY.

UNITED STATES PATENT OFFICE.

IIANSFIELD C. CRAWLEY, OF ORCUTT, CALIFORNIA, ASSIGNOR TO ADDOGRAPH COMPANY, A CORPORATION OF CALIFORNIA.

ADDINWTACHMENT FOR TYPE-WRITING MACHINES.

Specification of Letters Patent.

Patented Jan. 14, 1913.

Application filed July 28, 1908. Serial No. 445,702.

To all whom it may concern:

- Be it known. that I, MANSFIELD C. CRAW- LEY, citizen of the United States, residing at Urcutt, in the county of Santa Barbara and State of California, have invented new and useful Improvements in Adding Attachments for Type-\Vritin Machines, of which the following is a speci cation.

This invention relates to adding machines, and pertains particularly to a mechanical adding attachment for an ordinary typewriting machine.

The object of my invention is to provide an adding machine which ma be attached to any typewriter having a eyboard and sliding carriage, and which will automatically add and carry the .total of any list of figures that may be printed by the typewritergand which will allow the numerals on the keyboard of the typewriter to be used in printing figures on any part of the sheet; which will be electrically operated, and will be provided with suitable means whereby any number of any denomination may be automatically brought into operation when the carriage comes into position to close the electric circuit, to print the proper figure in the proper column; which machine will not in any wayinterfere with the typewriter to which it-is attached, but will'allow the typewriter to be used for any and .all purposes for which it might be used were the adding machine not attached thereto; and which adding apparatus Will be simple, practical, reliable in operation, and not liable to get out of order. y

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figurel is a front .elevation, the case being in section. Fig. 2 is a side elevation. Fig. 3 is a fragmentary Iplan of a key-board and contact elements. ig. 4 is a detail of the control levers, in side elevation. Fig. 5 is a detail of the rack operating elements. Fig. 6 is a. detail of the resettin gear. Fig. 7 is a general plan of the attac ment. Fig. 8' is a diagrammatic view of the pin-gear able means,

and associated elements. Fig. 8 is aside view of same. Fig. 9 is a lan of the stop action. Fig. 10 is a detail of the brake. Fig. 11 'is a diagram showing the electric circuits.

A represents the frame of an ordinary typewriting' machine provided with the usual keys 2 and the sliding carriage 3. The keys 2 connect with operating levers 4 by which the type, not shown, are operated in a manner well known in the art.

The adding attachment forming the essential feature of the present invention comprises a suitable frame or casing B housing the adding and computing mechanism, and electrically connected with the keys and carriage of the typewriter in the manner as hereinafter substantially described.

The frame or casing B may be of any suitable size, shape or material, and may be entirely independent of the typewriter, it being designed to stand on the table or desk near the typewriter. l

The adding and computing mechanism includes a series of rack-bars 5, there being as'many of these rack-bars as there are denominations and. numerals. That is to say,

there is a unit rack-bar, a tens rack-bar, a"

hundreds rack-bar, and so on the unit rackbar being arranged at the extreme right, as herein shown, and increasing up to the millionths denomination to the extreme left. Manifestly there could be any number of these rack-bai s, according to the desired capacity of the machine. These rack-bars are loosely fulcrumed at 6 to a rockin frame 7, which latter is fulcrumed at 8 and is oscillated by means hereinafter described, on-the energizing of a main magnet or .magnets 9. Each rack-bar has an oscillating movement independent of every' other rackbar and toward and from a respective denomination pinion 10; the oscillation of each rack-bar being accomplished by suit- ,as a lever'll fulcrumed to a fixed stud 12 and operated on the one 'zation of a res tive coil 13. The recipro- .cation of the ars 5 is accomplished by the oscillation of the frame 7, and the oscilla torv movement of. any particular bar 5 to carry itinto mesh with its respective denomination pinion 10 being accomplished by a respective lever 11 and coil 13. There is a denomination pinion 10 for each rackbar, and each denomination pinion controls a corresponding count-wheel 14. The denomination pimons-lO are loosely mounted on a shaft ,15, and with these pinions meshes a corresponding gear 16 on a respective moat-wheel, the several count-wheels being loose on the count-wheel shalt 17, and denominationally arranged in train.

The number of teeth on the rack-bar and on the respective intermeshing pinions -44: is such that a complete rec1procation of a rack-bar will serve to turn both its denomination pinion and its count-wheel nine-tenths of a revolution; and suitable connections are made between each of the count-wheels, so that a full revolution of the unit wheel will turn the vtens wheel onetenth of a revolution, and correspondingly a full revolution of the tens wheel will turn the hundreds wheel onetenth of a revolution, and so on. This inter-drive of the count-wheels is done by a small pin 18- on each denomination pinion adapted to inter? mesh at each fall revolution of that pinion with a notch 19 in the rim of the next adjacent count-Wheel.

Any suitable form of brake or click may be employed to limit the movements of the various count-wheels and denomination pin ions, as, for example, the spring click 20 mounted on bar 21 and engaging depressions on one side of the denomination pinions 10. There are ten of these depressions, and at each one-tenth of a revolution the knob on the end of the brake 20 engages in a depression and tends to limit its further movement.

There is an armature lever 11 and respective coil 13 for each rack-bar 5, and whenever a coil 13 is ener ized the armature. end of the lever is pulled down, and the other end lifted to carry its particular rack-bar into mesh with its pinion 10. If the coil 9 is then energized, the core 1230f the latter, which core has a non-magnetic connection 24 with the frame 7, will he drawn into the coil, and the frame 7 will be oscillated to reciprocate all'the bars 5. However, the only rack,- har which will operate any pinion is the one which is lifted by its particular lever 11, and the operation of this lever is controlled by a particular key on the keyboard of the typewriter, as will be shortly explained.

Each rack-bar 5 is designed to be reciprocated only a distance, however. corres 'ionding to the numeral represented by the key struck on the keyboard of the typewriter. That is to say, suppose 129 isto he struck on the typewriter and represented on the adding machine, l is in the hundreds l column or denomination, 2 is in the tens column, and 9 is 1n the units column.

Since the several racks correspond to denominations of numbers, the levers 11 also correspond to these denominations, and when the key for numeral 1 is struck, the hundreds lever 11 will be lifted to carry the hundreds rack 5 into mesh with the hundreds denomination pinion 10. But since the hundreds count-wheel should only reg ister l it is, therefore, necessary to limit the reciprocating movement of the rack 5, so that the hundreds denomination pinion and the hundreds count-wheel will only be given one-tenth of a revolution. This is 'done by limiting the length of reciprocation of the bars 5 spacially, in accordance with the particular number struck on the keyboard oi the typewriter, by means of a limiting plate and a series of magneti cally operated levers26 having pins 27 which are interposable in the path of respective shoulders or ahutments '28 on plate 25, the operation of which plate will shortly be de scribed. lVhen the key for the number 2 in the tens column of the sum 129 above referred to is struck, the tens lever 11- will be lifted to operate the tens rack-bar 5 and correspondingly operate the tens denomina- -tion pinion and count-wheel; the length of the reciprocation of the tens rack-bar being limited by the plate to two-ninths of a full reciprocation. 'hen the 9 key on the keyboard is struck, representing the units, the units lever 11 and its rack-bar 5 and corresponding units pinion 10 and count-wheel will be operated similarly; there hein no need of a limiting lever '26 and pins 2 for the 9 key because bar 25 moves its full stroke then and is only limited by the pins 29.

The plate 25 is pivotally connected with the fulcrum bar 6 to which the several rackbars .5 are pivoted, and the plate 25 reciprorates in unison with the rack-bars. The plate is guided in its reciprocating movements by suitable means, as the pins 29 fixed to the bed-plate 30 and operating in the slots 31 in plate 25. i

There are only eight of the pins 27, corresponding to Figs. 1 to 8 inclusive, while the pins 29 serve for the numeral 9,. The pins 27 which are carried by the levers 26 operate through holes in the bed-plate 30, and normally all these pins 27 are depressed below the plane of plate 25, so that if the magnet 9 is energized, the plate 25 and rackbars-5 would make a full reciprocation.

The pins 27 are disposed, however, in such staggered relation, as shown in Fig. 9, that pin representing numeral 1 if raised into the path of its respective shoulder 2R on plat-e 25 will allow the'plate 25 to make.

only one-n nth of a reciprocation, and so -wrrespoinling to tlwpartirular commutator on, with each succeeding pin. In 0rder graphioall' to illustrate the operation of this check meehanisn'i, I have numbered the pins corresponding with their numerical value by n ans of a small eirele incloslng the numeral represented by the particular pin; thus I (D, (-1), etr. The levers 26 whlch carry the limiting or stop pins 27 are fulerumed to a fixed standard 32 and are acted on by r speetive n'iagnets 33. The manner of operating these several magnets and ae eomplishing the desired results, is effected from the keyboard of the typewriter by suitable eleetriral connections, as follows: Arranged beneath eaeh key bar 4, corre sponding to the numerals 1 to 9 inclusive, is a respet'tive spring eontaet member 34; all these contact members 3t being eleetrieally connected in series and normally insulated from the remainder of the apparatus. Eat-h oontart member 34 has a (on'iplementary eontart member 3.? toward and from which it. is movable to close a eireuit. Eaeh eontaet member 33. exrept the eontaet for key 9 is elertrir-ally eonneeted with a eorresponding limiting roil 33. The other terminal of all the (oils 3?) eonneets with the main magnets 9. and the current thenre passes through the batteries 34 by a wire through the denomination magnets 12}: the other terminals of these denomination magnets are ('onneeted with respeetive ('ontaet points or rommutator sertions I)? insulated from and earried by the frame of the typewriter. "lhese rontaet surtaees or commutator seot'ions 37 are arranged with relation to an adjustable Contact point 38 mounted on. and insulated from, and slidable lengthwise of. the typewriter ('arriage This eont art point 35 is adapted to be moved over the several rommutator seetions 37, and whenever the e ntaeti point 218 is over any partieulaset-lion and switeh $19 closed, a. enrrent will he sent through the apparatus seetion 37 on whioh the point 3.? is resting; the point 3% having suitable eleetri al eonneetions l) with the several rontat'ts 34.l The objeet ot the switeh 3'.) is to diseonneet. the adding apparatus from the typewriting l marhine and allow the typewriter to be opi erated without rlosing, any eireuits or actuating the adding maehine. The eommntator seetions 37 represent l various denominations .in sequence from left to right as units, tens. hundreds, ettz, just a the magnet 13. rack-bars 5, pin ions 10 and eonnt=wheels 14 represent variousdenominations The operati n of the invention is as follows: Assuming that a rolumn of figures is to be talu latwl --n the typewriter, and the sun] n determined: The carot the em riage is shifted so as to permitv printing on l any desired portion of the sheet, and the pointer 38 moved so that it will stand over the unit seetion 37 whenever the carriage IS in position to have a unit numeral printed on the sheet. The. direction of movement of the carriage in printing is indicated by the arrow adjaeent to pointer 3 Fig. 3. The switch 3.) closed; and then assuming that a set of figures such as 2 and 19 are to be added together, the carriage is in position so that the unit number 2 will be printed in the right plaee. This also means that the pointer 38 is over the unit section 37. The key on the typewriter indicating the figure 2 is then struck, and the eircuit elosed, whirl) may be traced as follows, by ret'erenee to the diagramn'nttie Fig. 11, Pressing down on key 2-. whieh for the time'being is of the units denomination, its respective eontaets 34 35 are moved to t'ltbt the oireuit' between the bus-wire 4t and a wire 42 which leads through a respeetive "2 limiting magnet 32;, thence aeross by wire ii) to a wire it. through the main magnets ihthenee through the battery 36. through wire 34;. through the unit denomination magnet 1?. theme by a wire 45 to the unit set'tion I57, and through pointer its to tho plaee of beginning. The eireuit thus traeed first energiies the 2 limiting magnet 33 to pull down on its lever 32 and projeet its 2 pin :37 up through a hole in the plate 30 and in the path of a. corresponding shoulder is of the limiting plate The current energizes the main magnet 5t, art'uating its eore -1 to rot-k the frame '7 and reeiprorate the raekbars simultaneously in one direetion. These rack-bars 5,

however. ean only niove ttwo tooth spaees,'

owing to the obstruetion atl'orded by the 2 limiting pin. At the same time that the limiting magnet 33 and the main magnet .t are energized. the unit denomination magnet 13 is also energized to pull down unit lever 11 and lift the unit rack-bar 5 into engagement with the unit denomination pinion 10. Consequently, when the cireuit is eompleted the unit eount-wheel 14 i will indirate 2 through a suitable window opening 45 in thoadding maehine easing. As soon as the pressure on the unit key L) l l rt is I tastt. a spring .1. arts to ietratt i therore members .23, roekthe frame 7 and thereby throw the raek-bars 5 back to initial position; the releasing of the key having interrupted the circuit in all the (oils so that the bars 5 drop down clear of the pinions 10 and do not act on these pinions in being returned to initial position by the aetion of the spring The nevt number to be written being 19. the rarriage is barked up so that the 1 will be printed .in the tens column. and the operation is repeated. This timewhen the key 1 is struck in tens column it will act through a similar circuit as before to register on the tens countwheel; but when the 9 key is struck, there is no need for a limiting magnet in the 9 key circuit, because the bar may now go its full stroke, limited only by the pins 29. As each set of figures is wrltten, one set under the other in column form, the total is represented .in a manner well understood, on the count-wheels and through the window 45. \Vhcn it is desired to print the total, the switch 39 is opened so that the count-wheel will not be disturbed for the time being, and the total is then written in on the typewriter in the usual fashion. The switch 39 is intended to remain, open at all times, except when it is actually desired to tabulate or determine the sum of any column of figures.

The counting attachment can be set back to Zero at any time by suitable means, as the shaft 46 and pinion 47 adapted to engage with the long pins 48 on the several denomination pinions 10. The shaft 46 is suitably mounted in the frame of the adding attachment and has a limited sliding movement to carry the teeth on the spur gear 47 into and out of the range of action of the'pins 48; a spring 49 normally maintaining the gear .47 in neutral inoperative position, and a collar 50 limiting the movement of the shaft which carries tlze gear 47 into engagement with the pins 48. The shaft- 46 is turned in either direction by suitable means, as the milled head 51. There are but nine of the pins 48, although there are spaces for ten around a circle. That is to say, two of the pins are separated from each other by an arc of 72, while the other pins are separated by arcs of 36 each; this wider space allowing the gear 47 to be moved up close to its respective dcnon'iination pinion 10, and to be turned without touching any of the pins 48; this open space corresponding to zero on the countwhecls. In consequence of this construction, all the count-wheels can be set at zero at any time by simply pulling over on the shaft. 46 to carry the several gears 47 toward their respective denomination pinions 10; and then by turning the shaft 46 only those denomination pinions which have been moved, and which do not already stand at zero, will be turned; and the moment that any count-wheel comes to zero it will stop, because its respective resetting gear 47 is turning free in an open space between :1 set of pins 48.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. The combination with a'typewriter and the carriage thereof, of a ty ewriter key, a computing wheel, means inc uding a rack bar for operating the computing wheel, and electro-magnetic connections through the carriage and controlled by the key for Operating said bar, said rack bar pivoted at one end, a sliding stop plate'moving in unison with the rack bar, and means or varying the limit of sliding movement of said plate.

2. The combination with a typewriter carriage and an operating key, of a computing wheel, means including an oscillating rack bar for operating the wheel, a kicker for throwing the rack bar into operative relationship with the computing wheel, and electromagnetic connections through the carriage and controlled by the key for actuating said kicker and reciprocating said bar, a sliding stop plate moving in unison 'with the rack bar, and means for varying the limit of sliding movement of said plate, said last named means including selective stop pins, 'and means for controlling the action of the pins.

3. The combination with a typewriter carriage and an operating key, of a computing wheel, means including a rack bar for operating said wheel, a sliding stop plate and coacting stops for limiting the reciprocating motion of the rack. bar, and electrical connections controlled by the key for actuating the rack bar and said stop mechanism coordinately.

carriage, of a series of numbering keys, 2 series of count-wheels, denominatlonally arranged in trains for units, tens, hundreds, etc., mechanical means for actuating said count-wheels, electrical connections with the carriage and controlled by the keys for actuating said count-wheel operating means, and selective mechanism for the count-wheel operating means controlled by the carriage, said selective mechanism comprising a sliding stop plate, and pins movable into and out of the path of said stop plate.

5. The combination with an operating numbering key, of a series of count-wheels denominationally arranged in train for units, tens, hundreds, etc., a denomination pinion for each count-wheel, a reciprocating rack bar for each denomination pinion, said i lrack bars movable toward and from the respective pinions, electro-magnetic means controlled by said key for operating the several rack bars, and selective mechanism by which only the rack bar of the particular denomination will be operated at one actuation of said kev, said selective mechanism comprising a sliding stop plate, and pins movable into and out of the path of said stop late.

6. he combination with an operating l key, of a plurality of count-wheels denomil 3 nationally arranged in tram, denomination pinions corresponding thereto, rack bars en- 4. The combination With a typewritergageable and disengageable with res ctive of said mechanism whereby only the rack bar corresponding to the denomination of the number struck by the key will be engaged with the pinion, said selective mechanism com-' prising a sliding stop plate, and pins movable into and out of the path of said stop plate.- I

7. The combination with an operating key, of a plurality of count-wheels denominationally arranged in train, denomination pinions corresponding thereto, rack-bars engageable and disengageable with respective of said pinions, mechanism controlled by the key for reciprocating the rack bars, mechanism controlled by the key for engaging and disengaging the rack bars with said pinions, selective mechanism whereby only the rack bar corresponding to the denomination of the number struck by the key will be engaged with the pinion,'and means for limiting the reciprocating movement of said rack bar, said last named means including a sliding stop plate with stops corresponding to the rack bars and movable into and out of the path of the stop plate.

8. The combination of an operating key, a count-wheel, a denomination pinion con- I nected with said count-wheel, a rack bar enplate.

gageable and disengageable with said pinion, electro-magnetic means and electrical connections controlled by the key for reciprocatin said rack bar, electro-magnetic means an connections controlled by the key for engaging the rack bar with said pinion, and electro-magnetic means and connections controlled by said key for limiting the reciprocating movement of said rack bar, said last named means and connections including a reciprocating stop plate with stops .corresponding to the rack bars and movable into and out of the path of the stop 9. The combination of a series of denomi nation pinions, count-wheels arranged denominationally intrain and operative by said inions, pivoted rack bars engagcable and isengageable with said pinions, electrically-operated means for reciprocating the rack bars, and electricallyfloperated means for independently engaging and disengaging the several rack bars with their respective pinions, said last named means including a pivoted kicker bar, and a magnet operative thereon to throw the rack bars into engagement with their pinions.

10. The combination of a series ofi denomination pinions, count'wheel's arranged denominationiilly -in train and operative by saidlpiniens, rack bars engageable and disengageable with said pinions. electrically-i operated means for reciprocating the rack bars, electrically operated means for independently engaging and disengaging the several rack bars with their respective pinions, and electrically operated selective mechanism for limiting the movement of saidrack bars, said selective mechanism comprising a sliding stop plate, and pins movable into and out of the path of said stop plate.

11. Thexcombination of a series of denomination pinions, count-wheels arranged denominationally in train and operative by said pinions, a rocking yoke, rack bars pivoted to the yoke and movable in unison therewith, a sliding stop plate carried by the yoke and movable in unlson with the rack bars, staggered stop pins corresponding to the rack bars and interposable successively in the path of the stop plate, a key-board, means to move the racks into engagement with their pinions; and electrical connections operating through the keys on the keyboard and through said yoke and stop pins and the mcans'for engaging the racks with the pinions, the yoke will be operated and the particular count-wheel will be operated corresponding to the keys struck.

12. The combination of a series of denomination wheels, a series of pinions related theretp, rack bars effective upon said pinions, and means for controlling the reciprocation of said bars, said means including a reciprocating plate having sta gered shoulders engageable with stops which limit the reciprocation.

L3. The combination of a series of wheels,

inp lateral shoulders, and stop pins engage-' able with said plate to limit the movement of the plate.

15. The combination in an adding machine, of a plurality of denomination wheels, means for actuating said wheels, and a device for controlling the actuating means,

said device including a plate havin staggered, lateral projections, and movable stops engageable with said projections. I

16. The. combination with a t writing machine, of a computing mechanism including count-wheels, instrumentalities for actuating said wheels, and a device ing the actuations of said wheels, including a plate having lateral, staggered shoulders on opposite edges adapted to engage stops.

17 The combination in a computing mechanism of denomination wheels, reciprocable, tiltable racks for actuating same, a reciprocating plate having staggered, lateral shoulders on its edges connected to the l movement of the plate I In testimony whereof I have hereunm set i my hand in presence of two Subscribing Witnesses. V V MANSFIELD C. CRA LE3! \Vitnesses:

H. G. Bimoos, A. L STILLMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C.

for limitrac's, and selective pins for limiting the 10 

